Sound-reproducing machine



hum-1930. L. SHAPIRO 1,762,247

I SOUND REPRODUC ING MACHINE Filed April 13, 1925 2 Sheets-Sheet l v awpwtoz L. SHAPI RD Q hus/ Gum/h y Q 4 W sTA'res .PFATENT OFFICE LAZARUS sHArIRo,v or BRONX,INEW YoRx, AssionoR TO RADIo CORPORATION 01? AMERICA, A CORPORATION or DELAWARE SOUN D-REPRODU GIN G MACHINE Application filed April 13,

This invention relates to sound-reproducing apparatus, and an object of the invenalternatively and comprise, on the one hand,-

means of an electromagnetic -character adapted for control by radio receiving apparatus, and, on the other hand, a stylus for operating the diaphragm under the control of a phonograph record.

Mother-important feature of the invention contemplates the 'PPOVlS Q IQffi; p v tubular arm having means mountedfiiiereoll for reproducing sound under the control of a phonograph record and having other means mounted thereon for reproducing sound under the control of radio receiving apparatus, both ofsaid means being preferably carried by a sound box arranged for movement relatively' to the tubular arm.

' A further feature of "theiinvention resides in the provision of a sound R mmed t0 being in raised position; 7 Ai Fig. 2 1s a v1ew'1n sectional elevation taken 1923. Serial No. 631,764.

of the invention, the machine is provided with a casing containing means for supporting and rotatin a phonograph record and" a cover in whic radio receivingapparatus is mounted, the sound box of the machine having diaphragm operating means mounted thereon including electromagnetic means and V. V

a stylus for actuation under the control of a phonograph record, and connections being provided between the electromagnetic means 0 on the sound box and the radio receiving ape paratus in the cover of the machine'casing so as to enable the sound box to be operated either by a phonograph record or in accord ance with signals received by the radio rev ceiving apparatus.

Still other objects and features of the in-' vention will appear as the description pro-A Y ceeds, and will be pointed out in the appended claims.

In the drawings in which. like reference numerals designate like parts throughout the various views:

-Fig. lisayiewin. front elevation of a machine embodyin the inv ehtiofifiarts' of the machine being roken away and the cover substantiallyalgng theline 22 of- Fig. 1;-

Fig. 3 is a section'ahview in plan of the 80 tubular arm and the joint betweenthe tuba s lar arm and the soundbox;

swing forwardly and rearwardly on a piv- .Fig. it is a view in sectional elevation taken oted, tubular arm, and having a stylus for operating the diaphragm of the sound box in its forward position relatively to the tubu lar arm.gid electromagnetie means for operating thediaphragm, of; the sound box in "The bore of the tubular armrnay communicate with the'hornof 'the sound reproducing machine in a manner common in the construction of phonographs, and a joint is pro- 45 vided between the/sound box and the tubular arm so constructed as tocause communica tion between the sound box and the tubular arm in both the forward and rearward po-" sitions of the sound-box relative to the arm.

'50 In accordance with astill further feature its rearward position relatively to the arm.

- of the electromagnetieme'ans for operating the diaphragm of the sound box; and

Fig-.11 is a View ofthe coil frame looking toward the left in Fig. 10. g f

The illustrated machine comprises a casing 2 having a cover 4 hinged thereto as indicated at 6. The casing 2 may be made in a manner usual in the construction of phonographs and has a top plate 7 provided with a removablesection 8 on which is rotatably journalled a table 10 operated by a spring motor contained in a housing 12 secured to the under side of the section 8. The casing 2 is further provided with a horn 14, exten sion 16 and front swing doors 18, such parts bein also of a construction and arran ement heretofore employed in phonographs. The horn 14, as shown, has its rear end turned upwardly and secured to the top plate 7. Journalled on the upper side of the top plate 7 is a tapered, tubular arm 20 designed-to support separately actuated devices for reproducing sound, one of such devices,

reproduce sound under t e cont-rel of a' phonograph record mounted on the rotatable table 10. The journalling of the tubular arm 20 on the top plate 7 enables the stylus '21 to follow the groove of a record mounted arm 20 by a joint including a bowed tube 26 having one of its ends sleeved into a cylindrical member 28 mounted on the free, reduced end 27 of the arm. The end of the tube 26 within the cylindrical member 28 is provided with an opefiingfil arranged in alignment with the bore of the tubular arm 20. .The other end of the bowed tube 26 has fitted therein a hollow boss 32 projecting 1 material.

centrally from the base of the sound box '22, and is provided with a suitable pin (not shown) arranged to enter a groove 34 (Fig.

6) on the periphery of the boss 32 to enable the sound box to be detachably connected with the bowed tube 26. V

As shown (Fig. 7), thesound bo x 22 comprises a disc 36 formed to provide a chamber 38 on the side opposite frorg the hollow boss32. The diaphragm 24 of the sound box is housed within the chamber 38 of the disc 36,. and interposed between the edge of the diaphragm 24 and the body of the disc 36is a ring 42 composed of suitable flexible A similar ring 44 is arranged on the oposite side of the diaphragm. The dia- .as shown, including a st lus 21, operable to veniently be formed from sheet metal, and on the outer face of which is mounted a permanent magnet 50 of generally semicircular form and having reduced portions 52 and 54 at its ends upon which are mounted oppositely disposed pole-pieces 56 and 58. The pole-pieces 56 and 58 are generally U-shaped in cross section (Fig. 7) and provide a chamber for the reception of a coil frame including spaced sides 60 having correspondin'gly shaped openings which receive the ends of a rectangular member 62, which, in turn, is adapted to receive an armature 63 for operation by the pole-pieces 56 and 58 of the magnet 50. At opposite sides of the rectangular member 62 are pieces 64, which like the sides (30 of the coil frame, may be composed of brass or other suitable material, and which extend between the sides 60 of the coil frame and through the openings in said sides between the side walls of the rectangular member 62 and the ends of the openings. The pieces 64 are formed at their ends with lugs 66 turned away from the member 62 at right angles to the bodies of the pieces and lying along the outer faces of the sides 60 of the coil frame.

The armature 63 is, preferably and as shown, supported from pieces 64 by means of projections 68 formed integrally with the armature 63 and extending outwardly from the edges 70 of the armature through openings 72 in the side walls of the rec tangular member 62. The side walls of the rectangular member 62, which may be made from card-board or other suitable non-conducting material, are preferably quite thin, and the edges 7 O of the armature G3 are preferably arranged in close proximity to the sides of said member. Accordingly, if the projections 68 were simply extended outwardly from the edges 70 of the armature, such projections would be relatively short and would not flex readily. In order to cause the projections 68 on the armature 63 to be made readily flexible so as to enable the armature to pivot freely upon such projections, the armature 63 is notched 011 opposite sides of the projections 68, as indicated at 74 (Fig. 10).

The space defined by the sides 60 and the rectangular member 62 of the coil frame, on the one hand, and by the top of the polepiece 56 and thebottoin of the polepiece 58, on the other,"is occupied by a coil 76, through which an electric current may be passed which will give rise jomagnetic flux in the phragm 24 and rings 42 and 44 are secured-- in position within the chamber 38 of the i disc by an annulus 46 threaded into the armature and thereby cause the armature to be turned in one direction or the other upon the pivoted projections 68.

As shown, the armature 63 is provided at its opposite ends with ears 78 and 80, the

chamber 38. Secured to the disc 36 many former of which, in the illustrated construcsuitable manner is a plate 48 which may contion, receives oneend of the bar portion81.

of a T-shaped member 82, and the latter of which receives the free end of a leaf spring 84 carried by the pole-piece 56. The

other end of the bar portion 81 of the T- shaped member 82, is connected to the center of the diaphragm 24 as indicated at 86. The leg. portion 88 of the T-shapcd member 82 extends through a notch 90 in the permanent magnet and isfulcrumed at 9.2 on a lug 94 extending laterally from the periphery ofthe disc 36 of the sound box. The stylus or needle 21, hereinbefore mentioned, is mounted in the free outer end of,the leg 88. As shown, the permanent magnet 50, pole-pieces 56 and 58, and the coil frame are housed in a cylindrical shell 98 of suitable dimensions.

It will be apparent from the foregoing that the above-mentioned construction includes a stylus 21 by which the diaphragm 24 may be operated under the control of a phonograph record, and that the permanent magnet 50, pole-pieces 56 and 58, and the partsassociated with them provide separate- 1y actuated electromagnetic means by which be operated, Although the illustrate construction comprises a single sound box 22 and diaphragm 24 mounted on the tubular arm 20, it is 0 recognized that the arm 20 may be provided with a plurality of sound boxes or with a single sound box having a plurality of diaphragms so long as the sound boxes or diaphragms are operated by s eparately actuatedmeans.

Preferably and in the illustrated machine, the electromagnetic means, which includes the armature 63 and the parts associated with and, as shown, the radio receivin ga pparatus is mounted on a panel 100 supportedin the gized by means other than radio receiving-- apparatus, e. g. by current conducted ex'-.

clusively over wires, within the sc0pe of.

63 of the 'electromagnet when the sound box- 22 is swung rearwardly with relation to the tubular arm 20, as shown in Fig.2. It'fols lows, therefore, that the stylus 21 and the electromagnet are designed to operate the diaphragm 24 alternatively. The sound box may be retained in the position shown in Fig. 2 by a stop 124 (Fig. 3) as is usual in phonographs of certain types. a In order to permit sound arising from the operation of the diaphragm 24 to be transmitted to the bore of the tubular arm 20, whether the diaphragm is operated by the stylus 21 or by the armature 63 of the electromagnet, the

opening 30 of the bowed tube 26 is elongated in the direction of rotation of the tube (Fig. 4) so as to cause theinterior of the bowed tube 26 to communicate with the bore of the tubular arm 20 both in the forward position 1 of the sound box relatively to the tubular arm 20 and in the rearward soundbox relati ely to the arm."

The wires leading to and from the radio receiving apparatus mounted 'on the cover 4 of the machine casing 2 are preferably secured to binding posts on a block 126 deposition of pending from the top plate 7 of the casing, I 1t, 1s energized, by rad o rgzgnnna anpnaratns agltlig radio receiving apparatus is connect- 22 b a wire 128 attached to binding posts cover 4. of the machine casing. The radio on t e block 126 and passing into the bore receiving apparatus comprises an inductance of the tubular arm 20 and from thence coil 102, a coupling coil 104 and a variable through the opening 3(l and thebm tube condensg 106 contained within a shield 108 26 to the sound taxes. As shown, (Fig. 3 (Fig. 2) and fiirther comprises vacuum the wire 128 is led outwardly from the bowed tubes 110 an dtransformers 112. The contube 26 adjacent to the'sound box through trolling elements of the ra iTre-seuzmg apa sealed opening 130, and then through a *lfiled Sept. 2, 1922, for. Sound reproducingparatus are mounted on the front oftlPno-tehiBZimthgshgll 98 into the sound box. panel 100 and include a main. The arrangement cfithe wire fisdmthe switch 114, a' evice' 116 for adjusting the manner just described enables the tiliaphragni inductances of the primary and secondary of the sound box 22 to be operated at the circuits, a devic'e 118' for varying the cou willrof the user eitherunder the control of pling between the. primary and the seconda phcfigraph record or'in' accordance with my circuits, and devices 120 and 122! for signals receivedby -theradio receiving apregulating the variable cdffdensgrs in the paratus, and at the same timecausesthe tubuprimary and secondary circuits respectively. lar arm 20 and the sound box to present sub- The radio receiving apparatus does not re .stantially the same outward appearance as quire to be further described herein, since ina phonpgraph in which the .diaphragm' it may be and preferably is, arranged as decan be operated only. by a stylus.

scribed in the application for Letters Patent 'Having describeimy invention, what I of Alfred N. Goldsmith, Serial No. 587,067, claim is y 1. A sound-reproducing apparatus com- It 1s recogn1zed that the 'electro.-\pris ing a pivoted, tubular arm, a sound box machine.

e5 magnet having thearmature'63 may be ener- @unted to swing about an axis other than its own forwardly and rearwardly on the arm, and having acoustic connection with the interior of the arm in both the forwardly and rearwardly swung positions, a diaphragm mounted on the sound box, a stylus for operating the diaphragm in the forward position of the sound box relatively to the arm, and electromagnetic means carried by the sound box' for operating the diaphragm the sound box is swung about an axis other than its own rearwardly'with respect to its arm, a stylus mounted on the sound box in position for engagementwith a phonograph record when the sound box is swung forwardly on the arm, and electromagnetic means carried by the sound box for operating-the diaphragm when the sound box is swung rearwardly with relation to the tubu- 10 of the sound box in its rearward position relative to the arm.

2. A sound-reproducing apparatus comprising a sound box, a tubular arm for su porting the sound box, a joint between t e sound box and said arm including a tubular member journalled rotatably on the arm and having an elongated slo't extending in the direction of rotation of the tubular member so as to cause the sound box to communicate with the interior of the tubular arm in either of two positions of the sound box', a diaphragm mounted on the sound box, a stylus for operating the diaphragm in one of said two positionsof the sound box, electromagnetic means for operating the diaphragm in the other of said positions of the sound '7 4 box, and a conductor housed in said tubular W arm and connected to said electromagnetic means. a

3. A sound-reproducing apparatus comprising a sound box, a diaphragm mounted on the sound box, a tubular arm for supportv ing the sound box, a joint between the sound box-andthetubulaearm-including a illblllal' member communicating with the interimf the sound box and sleeved in said arm, said tubular member having an elongated slot extending in the direction of rotation of the member and being of a length such as 40 to cause the tubular member to communicate witlTt'h'e interioref thefubular arm both when the sound box is swung forwardly with respectto the arm and when the sound box is swung rearwardly with respect to the arm, stylus mounted on the sound box in .position for engagement with a phonograph record when the sound box is swung forwardly on the arm, electromagnetic means carried 'by the sound box? for operating the diaphragm when the sound box is swung rear;

wardly withrelation to'thetubular'a'rm with V the" stylus out of engagement with a phonolar arm with the stylus out of engagement with a phonograph record.

LAZARUS sHAPIRo.

graph record, and a conductor extending i through said tubular arm and said slot and 55 connected with the electromagnetic means,

i 4:. A sound-reproducing apparatus comprising -a s0und/box,"a diaphragm mounted on thesound box, a tubular arm for support ing the sound box, a joint between the sound no box and the tubular arm, constructed to pro I w videcommunication between th e diaphragm of the sound box and the interior of the tubular arm both when the sound box is swung aboutanaxis other than its own forv e5 wardly with respect to the arm and when N 0 

